Im looking for MyBB Expert that wanted to help me manage my forum, including fix some problems that make my forum very slow and unstable.

History of the problem:
A few weeks ago, for unknown reasons, the domain "http://forum.entomon.info" have become slow and problematic: the forum users complain that they often have to load the same page several times to see it well. Other times users must close and reopen the address of the forum, etc etc....